EP 3401644 B1 20200603 - ENCODER OUTPUT SIGNAL CORRECTION APPARATUS AND METHOD
Title (en)
ENCODER OUTPUT SIGNAL CORRECTION APPARATUS AND METHOD
Title (de)
VORRICHTUNG UND VERFAHREN ZUR KORREKTUR VON CODIERERAUSGANGSSIGNALEN
Title (fr)
APPAREIL ET PROCÉDÉ DE CORRECTION DE SIGNAL DE SORTIE DE CODEUR
Publication
Application
Priority
- JP 2004298954 A 20041013
- EP 05022387 A 20051013
Abstract (en)
[origin: EP1647811A1] A third harmonic distortion corrector is equipped for correcting a third harmonic distortion contained in a two-phase sinusoidal signals with different phases output from an encoder. A third harmonic calculator/detector calculates the amplitude a 3 and the phase Æ 3 of the third harmonic using Fourier analysis, based on change in radius r of the Lissajous waveform output from a r-¸ converter. The third harmonic distortion corrector corrects the third harmonic distortion of the two-phase sinusoidal signal A4, B4 based on the amplitude a 3 and the phase Æ 3 of the third harmonic calculated.
IPC 8 full level
G01D 5/244 (2006.01)
CPC (source: EP US)
G01D 5/2448 (2013.01 - EP US); G01D 5/2449 (2013.01 - EP US); G01D 18/001 (2021.05 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 1647811 A1 20060419; EP 1647811 B1 20190710; CN 101672665 A 20100317; CN 101672665 B 20111130; CN 1773220 A 20060517; CN 1773220 B 20100505; EP 3401644 A1 20181114; EP 3401644 B1 20200603; JP 2006112859 A 20060427; JP 4713123 B2 20110629; US 2006077083 A1 20060413; US 7109900 B2 20060919
DOCDB simple family (application)
EP 05022387 A 20051013; CN 200510129184 A 20051013; CN 200910151744 A 20051013; EP 18173842 A 20051013; JP 2004298954 A 20041013; US 24866905 A 20051012